There are three types of hydraulic pumps commonly used in small excavators: vane pumps, gear pumps, and plunger pumps.
1.Vane pump
The vane pump is a pump that can continuously compress and suck liquid. It is characterized by small size, light weight, simple structure and relatively low cost. However, its shortcomings are also obvious, that is, the oil supply is unstable and pressure fluctuations are prone to occur, so it is suitable for use as an auxiliary pump for small excavators.
2.Gear pump
A gear pump is a pump that compresses and sucks liquid through the gap between twin gears. It is characterized by simple structure, long service life, stable oil consumption, no noise, and smooth oil supply flow. However, its pressure stability is poor and it is suitable for use in systems with lower pressure.
3.Plunger pump
A plunger pump is a pump in which liquid is compressed by a plunger. It is characterized by stable flow and pressure, long service life and easy maintenance. However, the disadvantages are larger size, complex structure and higher cost.
2. Selection of hydraulic pump for small excavator
When choosing a hydraulic pump for a small excavator, you need to choose it according to your own needs and actual conditions.
If it is used as an auxiliary pump, then you can choose a vane pump; if it needs to be used in a system with lower pressure, then you can choose a gear pump; if it needs to be used in a system with higher pressure, then you need to choose a plunger pump.
In addition, factors such as the oil supply, pressure stability, service life, and price of the hydraulic pump also need to be considered.
3. Maintenance and maintenance of hydraulic pumps
No matter which hydraulic pump is chosen, regular maintenance and upkeep is required. It is necessary to regularly replace the filter element, check for leaks, and keep the hydraulic oil clean and dry. At the same time, you also need to pay attention to how to use the hydraulic pump to avoid overload use and frequent starts in a short period of time.
In short, when purchasing a small excavator hydraulic pump, you need to choose it according to the actual situation, and perform regular maintenance and upkeep at the same time to ensure the long-term stable operation of the excavator.
